Biometric and Morphogenetic Comparison of the Sibling Species Stylonychia mytilus and S. lemnae, including a Phylogenetic System for the Oxytrichids (Ciliophora, Hypotrichida)

Taxonomic and nomenclatural revision of Sl�de?ek's list of ciliates (Protozoa: Ciliophora) as indicators of water quality

“…Recent biochemical and genetical studies showed that some of the most widespread and best known ciliates, Paramecium aurelia, Tetrahymena pyriformis, and Stylonychia mytilus, consist of a complex of sibling species most of which are nearly or completely inseparable by classical morphological methods (Sonneborn, 1975 ;Gates & Berger, 1976 ;Nanney & McCoy, 1976 ;Ammermann & Schlegel, 1983 ;Wirnsberger et al, 1986) . The nomenclatural problems associated with this progress have been carefully analyzed by Corliss & Daggett (1983) .…”

Further Studies on the Polytene Chromosomes of Stylonychia mytilus (Ciliata, Hypotrichia).

“…Summing up, we think that in species of the Stylonychia mytilus complex (Wirnsberger et al 1986) such as in other species of Hypotricha Perez, 1967, Spear andLauth, 1976) polytene chromosomes are formed by the somatic pariring of the two homologues.…”

“…One of these is the existence (Jareno 1974) or not (Ammermann 1971) of somatic pairing during early development of the polytene chromosomes in species of the Stylonychia mytilus complex (Wirnsberger et al 1986). A little more attention has been focused on the question concerning possible roles of the macronuclear anlage (Alonso and Jareno 1974, Gaude 1981, Golikowa and Nilowa 1984, Jareno and Alonso 1973, Sapra and Dass 1970 and on the morphological and molecular char acteristics of the macronuclei (revs.…”

Lithium-induced developmental anomalies in the spirotrich ciliate Stylonychia lemnae (Ciliophora, Hypotrichida)

“…Detailed description of the cortical patterning process has been well documented in S. lemnae (Wirnsberger et al 1986) but the regulatory mechanisms are not known. Results of the present study demonstrate that lithium interferes with the quantitative regulation of development of surface organelles.…”